Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4MJW callsign genealogy
Currently held by Wildeman Jr, John E
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K4MJW's current licensee, walking backwards.
- Williams, Michael JALgranted 2024-03-21cancelled 2024-04-12
Successor callsigns
Callsigns held now by people who previously held K4MJW.
- Wildeman Jr, John EFLgranted 2024-11-27
All historical holders
Every license row we've seen with the callsign K4MJW, oldest first.
- Wildeman Jr, John E FL2015-01-09 → cancelled 2015-02-20
- Williams, Michael J AL2024-04-12 active